Håkan Elis Isacson, a former employee of IB, became the source for journalists Peter Bratt and Jan Guillou, who publicly revealed the existence of the secret Swedish domestic intelligence organization in May 1973. The disclosure exposed the operation of a clandestine state surveillance body that had not been publicly acknowledged, making the affair a major political scandal in Sweden.
On 4 January 1974, the Stockholm District Court convicted Isacson, Bratt, and Guillou of espionage and sentenced each to 12 months in prison. The prosecution of the former intelligence employee and the journalists demonstrated the legal risks surrounding disclosure of classified domestic-security activities, while the affair established Isacson as a whistleblower. The supplied source does not provide further findings about IB’s methods, oversight, or later institutional reforms.
